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Subject: Re: Christian Kongsted's book

Author: Uri Blass

Date: 01:43:52 08/22/03

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On August 22, 2003 at 04:15:30, Gian-Carlo Pascutto wrote:

>On August 21, 2003 at 17:33:57, Uri Blass wrote:
>
>>We can only say that we did not see a proof that Noomens book is superior.
>
>That is true.
>
>It's hard to draw a conclusion from those games. The book doesn't
>make hundreds of points of difference and the programs aren't all
>that far apart either. I agree with you on that. So whoever wins
>has a lot to do with luck.
>
>You used the word 'evidence' earlier but that's severely misplaced.
>It becomes evidence when it's statistically significant. Before that,
>I wouldn't put any faith in it.
>
>--
>GCP

Maybe there is a misunderstanding.
I did not mean to say that it is statistically significant when I said evidence.

The point is that even if the data is not statistically significant it suggests
something and I do not think that it is right to ignore the data only because of
the fact that it is not statistically significant.


I know that there are programmers who do not do it
see
http://www.f11.parsimony.net/forum16635/messages/52921.htm
for comparison that he used to decide that the change is not productive
see
http://www.innconx.com/~wildcat/279.html
http://www.innconx.com/~wildcat/282.html

282 scored one point more than 279 but the programmer decided not to accept the
change.

Note that I do not use a lot of testing like him but if there is a change that I
am not sure if to do it and a beta tester
tell me about these results then I accept the change.

Of course the difference is too small to get significant results but there is a
basis to give bigger probability to the event that 282 is better and not to the
event that 279 is better.


Uri



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